Characterization of Alteromonas denitrificans sp. nov.

Enger, Øivind; Nygaard, Harald A.; Solberg, Mads; Schel, G.; Nielsen, J.K.; Dundas, I.

doi:10.1099/00207713-38-2-231

Cited by 4 publications

(5 citation statements)

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“…Though the cells, as for V. anguillarum, meet starving conditions, viable cell counts increased until day 14. These results correspond with the observation that Pseudoalteromonas cells are able to survive for several years "in sterile, unsupplemented seawater" [34]. Cell division and growth were possibly supported by feeding on lysed V. anguillarum cells, as the viable cell counts of MLms gA3 became slightly higher than for the control starting from day 14.…”

Section: Discussionsupporting

confidence: 87%

Adverse Effects of ImmobilisedPseudoalteromonason the Fish PathogenicVibrio anguillarum:AnIn VitroStudy

Wesseling

Lohmeyer

Wittka

et al. 2016

Journal of Marine Biology

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As a prerequisite for use in marine aquaculture, two immobilisation systems were developed by employing the probiotic bacteriumPseudoalteromonassp. strain MLms_gA3. Their impact on the survivability of the fish pathogenVibrio anguillarumwas explored. Probiotic bacteria either grown as a biofilm on ceramic tiles or embedded in alginate beads were added to sterile artificial seawater that contained the fish pathogen. While immobilisation on ceramics followed a recently developed protocol, a medium allowing for alginate microencapsulation was newly developed. Anti-Vibrioactivities were obtained with both immobilisation systems. The viable cell counts ofV. anguillarumconstantly decreased within the first two weeks of the treatments evidencing the potential of the immobilisation systems for providing probiotic-based protection against this pathogen.

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Section: Discussionsupporting

confidence: 87%

Adverse Effects of ImmobilisedPseudoalteromonason the Fish PathogenicVibrio anguillarum:AnIn VitroStudy

Wesseling

Lohmeyer

Wittka

et al. 2016

Journal of Marine Biology

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“…It is known, for example, that members of the Alteromonas and Pseudoaltreromonas genera (which are found in close association with Trichodesmium spp. ; Hewson et al ., ; Lee et al ., ) include some denitrifying representatives but not all can reduce nitrate as far as nitrous oxide or dinitrogen (Enger et al ., ).…”

Section: Resultsmentioning

confidence: 97%

A denitrifying community associated with a major, marine nitrogen fixer

Coates

Wyman

2017

Environmental Microbiology

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SummaryThe diazotrophic cyanobacterium, Trichodesmium, is an integral component of the marine nitrogen cycle and contributes significant amounts of new nitrogen to oligotrophic, tropical/subtropical ocean surface waters. Trichodesmium forms macroscopic, fusiform (tufts), spherical (puffs) and raft-like colonies that provide a pseudobenthic habitat for a host of other organisms including marine invertebrates, microeukaryotes and numerous other microbes. The diversity and activity of denitrifying bacteria found in association with the colonies was interrogated using a series of molecular-based methodologies targeting the gene encoding the terminal step in the denitrification pathway, nitrous oxide reductase (nosZ). Trichodesmium spp. sampled from geographically isolated ocean provinces (the Atlantic Ocean, the Red Sea and the Indian Ocean) were shown to harbor highly similar, taxonomically related communities of denitrifiers whose members are affiliated with the Roseobacter clade within the Rhodobacteraceae (Alphaproteobacteria). These organisms were actively expressing nosZ in samples taken from the mid-Atlantic Ocean and Red Sea implying that Trichodesmium colonies are potential sites of nitrous oxide consumption and perhaps earlier steps in the denitrification pathway also. It is proposed that coupled nitrification of newly fixed N is the most likely source of nitrogen oxides supporting nitrous oxide cycling within Trichodesmium colonies.

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“…Currently, representatives of most culturable bacterial genera can be isolated both from terrestrial and marine environments. Yet, it is now established that the genus Pseudoalteromonas contains species that exclusively derive from marine waters and that members have been isolated from marine locations around the world [4]. Interestingly, a majority of the Pseudoalteromonas species seem to be associated with eukaryotic hosts.…”

Section: Isolation Of Pseudoalteromonas Speciesmentioning

confidence: 99%

“…These include P. tetraodonis , which produces the neurotoxin, tetradotoxin, the causative agent of pufferfish poisoning [7], and P. piscicidia , which releases a toxin suggested to cause fish mortality [32]. Furthermore, Pseudoalteromonas tunicata cells have been demonstrated to be toxic against invertebrate larvae [33] and algal spores [34] and P. denitrificans produces autotoxic substances which kill the bacterial cells and inhibit further growth in dense culture [4]. Production of toxic compounds may allow for the bacteria to control large scale processes, in contrast to the more restricted modification of their microhabitats caused by specific non‐toxic extracellular agents.…”

Section: Biological Activities Expressed By Pseudoalteromonas and Almentioning

confidence: 99%

Marine Pseudoalteromonas species are associated with higher organisms and produce biologically active extracellular agents

Holmström

Kjelleberg

1999

FEMS Microbiology Ecology

343

292

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The newly established genus Pseudoalteromonas contains numerous marine species which synthesize biologically active molecules. The production of a range of compounds which are active against a variety of target organisms appears to be a unique characteristic for this genus and may greatly benefit Pseudoalteromonas cells in their competition for nutrients and colonization of surfaces. Species of Pseudoalteromonas are generally found in association with marine eukaryotes and display anti-bacterial, bacteriolytic, agarolytic and algicidal activities. Moreover, several Pseudoalteromonas isolates specifically prevent the settlement of common fouling organisms. While a wide range of inhibitory extracellular agents are produced, compounds promoting the survival of other marine organisms living in the vicinity of Pseudoalteromonas species have also been found.

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Characterization of Alteromonas denitrificans sp. nov.

Cited by 4 publications

References 0 publications

Adverse Effects of ImmobilisedPseudoalteromonason the Fish PathogenicVibrio anguillarum:AnIn VitroStudy

Adverse Effects of ImmobilisedPseudoalteromonason the Fish PathogenicVibrio anguillarum:AnIn VitroStudy

A denitrifying community associated with a major, marine nitrogen fixer

Marine Pseudoalteromonas species are associated with higher organisms and produce biologically active extracellular agents

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